INBIKE IC-321 WIRELESS

I was one of the first in North America to purchase and install this INBIKE IC-321 when it was first released.

I have installed over 45 of these units. I fabricated my own design attachment that allows the SENSOR to attach to ancient SCHWINNS with blade forks.
These INBIKE IC-321 WIRELESS Speedometers need no modifications for installation on modern bikes with broomstick like forks.
On ancient SCHWINNS and almost every American manufacturered bicycle made before about 1977 will have thin blade forks or will have thin tubular forks which you will find are extremely difficult if not impossible to secure the SENSOR to the fork without it moving or jiggling around. For this reason, I designed my own attachment for the SENSOR that instead of using the fork, in my design for use on ancient SCHWINNS, I have the SENSOR hanging via a custom designed mount which hangs off of the left axle, just beneath the left axle nut. You can make something crudely with a Large BINDER CLIP placed over the SENSOR and JB WELDED or E-POXIED to the SENSOR, then use one of the chrome wire ears of the binder clip to mount under the left axle nut.............wrap black sewing thread around this chrome wire ear at where it squeezes the SENSOR............saturate this black thread with EPOXY, and this chrome wire binder clip handle becomes a RIGID chrome wire hanging mount arm....
...YOU OBVIOUSLY REMOVED THE OTHER Chrome Wire Binder Clip Handle..... Choose the Large BINDER CLIP size that most closely matches the size of the Sensor when you are sourcing your BINDER CLIP to build such a contraption that will allow you to mount these on ANCIENT SCHWINNS and other ancient antique bicycles. My installations were engineered and look factory engineered, but it was my neighbor who came up with the use of the BINDER CLIP method.......no 3D printer required, or custom stamped bracket...................just down and dirty MacGyvered (Richard Dean Anderson version of MacGyver...) part to make it work.

https://www.ebay.com/itm/Waterproof-...rkparms=aid%3D

https://www.ebay.com/itm/Wireless-LC...parms=aid%3D1:





Full Disclosure: I have never dealt with either of the two ebay sources linked above. They have good ratings and are USA based. Those are just two random examples of suppliers of the INBIKE IC-321 WIRELESS speedometer-odometer thing-a-majib. You may find other non-USA suppliers that have these for less but you'd be looking for a three week time lag for delivery from Shen Zhen or Hong Kong during the best of times. As I mentioned earlier, I have installed these on at least 45 bicycles. Initially I sourced them from the sole China maker and distributor as there wasn't a designated model number at that time. They have a NICE LARGE DISPLAY and they do come with the two necessary CR____ button batteries. These INBIKE IC-321 WIRELESS thingies are essentially LOW TECH like 1982 era bicycle computers, but it is a really good "Dumb" old-timey bike computer. The reason that I like it so much is the DISPLAY face is LARGE and it displays Time of Day at Top Left and it displays ODOMETER at Top Right---------------------CURRENT SPEED (your choice of MPH or Kilometers Per Hour).........you also have other stopwatch and trip odometer functions but I really like the SPEEDO(current speed) display that is Large and centered, and I like the Clock at Top Left and total ODOMETER mileage at Top Right more than anything.
You do not get any advance notice that the Battery is dying or dead, other than the Display Unit will be extremely dim before it does not display at all. INSTALL a New Battery and the Display again becomes alive, vibrant and bright. You will have to REPROGRAM and RE-SET ALL OF THE SETTINGS and Re-Enter the TOTAL ODOMETER Reading Each and Every Time that You REMOVE and REPLACE The BATTERY.
The Battery in the SENSOR seems to last longer than the battery in the Head Unit(DISPLAY). My experience has been that the original battery in the Head Unit will last approximately between 13 months and 20 months. All of the INBIKE IC-321 wireless speedos that I have installed are still working.
Now, you do get a brief crazy unrealistic speedo display for maybe one second or a second and a half when starting from a complete stop..........what happens is that the display doesn't stabilize on the accurate speed UNTIL the bike is going 5 MPH.......... That is something that all of these INBIKE IC-321 WIRELESS speedos do.
My suggestion to anyone who is doing the initital programming of the Time of Day, Miles or Kilometers, and the Tire Circumference Measurement in Milimeters of their Front Tire........................I suggest that if you need to re-enter and change or zero out the entire data and start over............JUST REMOVE THE Button Battery and Re-Insert it..........then begin again from scratch as you'd begin with the new speedo just out of the package...........The directions are almost decent considering that someone whose native language is Chinese, did the English translation. It is extremely simple to figure it out.
The Great Large centered SPEEDO display with the total ODOMETER mileage (or kilometers if you select it to read KM instead of miles per hour) is what really makes the INBIKE IC-321 such a great speedometer/odometer. It is extremely accurate (other than the display when going 0 to 4 mph..). You can set it for whatever four digit MILLIMETER total measurement or calculation of your Front Tire's Circumference. There are a few suggested mm figures for certain wheel and tire sizes BUT YOU CAN INSERT WHATEVER CALCULATION or MEASUREMENT THAT YOU COME UP WITH FOR GREATER ACCURACY........ Roll the wheel one precisely measured revolution on your hardwood floor of your dining room...........or just use that old 8th grade, " TWO PIE R "